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how i can get the part number of spark plugs for prius 2013 .
i clean it before 3 month .
yes MPG .
change spark plugs?? .
it doesn't burn any oil .
is it necessary to change the spark plugs because i never change it .
no lights no any error messages .
yes the engine run more than usuall?? .
my carhas 130,000 Mile and before one month the cons decrease from 47---49 to 40--42??? what is the problem??? what i can do?? Posted via the...